Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Common stock dividends, per share	$ 0.05		$ 0.05
Treasury Stock, Value	$ (531)	[1]
Stockholders' Equity Attributable to Noncontrolling Interest	114
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	447		1,913
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	461		468
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(723)		(707)
Treasury Stock and Other
Treasury Stock, Value	(569)		(737)
Deferred Compensation Equity	(76)		(73)
Stockholders' Equity Attributable to Noncontrolling Interest	$ 114		$ 111
Series A Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 1,000		$ 1,011
Series B Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 1,000		$ 1,011
Series E Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 1,387		$ 0

[1] 4 Includes noncontrolling interest held114 114